diff --git a/libs/ardour/rt_midibuffer.cc b/libs/ardour/rt_midibuffer.cc
index 911b3b7b2d..e2490c23c2 100644
--- a/libs/ardour/rt_midibuffer.cc
+++ b/libs/ardour/rt_midibuffer.cc
@@ -384,4 +384,6 @@ RTMidiBuffer::clear ()
 	_size = 0;
 	/* free the entire current pool size, if any */
 	_pool_size = 0;
+	/* rendering new data .. it will not be reversed */
+	_reversed = false;
 }